Organs. Organ systems. And the organism itself ... Red blood cells: carry oxygen to body tissues that need it. In plants, dermal tissue covers the leaves, fruits, flowers, roots and stems of ...

Human bodies defend themselves using a diverse population of immune cells that circulate from one organ to another ... closer to understanding the plant immune system -- an increasingly important ...

this article is a bit of a cheat sheet for the modern eater looking to upgrade their system ASAP! Here are 6 Easy Ways to ...